Initial commit

Author: CezaryKopacz

.gitignore

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+# Xcode
+#
+build/
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata
+*.xccheckout
+*.moved-aside
+DerivedData
+*.hmap
+*.ipa
+*.xcuserstate
+
+# CocoaPods
+#
+# We recommend against adding the Pods directory to your .gitignore. However
+# you should judge for yourself, the pros and cons are mentioned at:
+# http://guides.cocoapods.org/using/using-cocoapods.html#should-i-ignore-the-pods-directory-in-source-control
+#
+

Classes/CKWaveCollectionViewAnimator.swift

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+//
+//  UIApplicationExtension.swift
+//  CKWaveCollectionViewTransition
+//
+//  Created by Salvation on 7/21/15.
+//  Copyright (c) 2015 CezaryKopacz. All rights reserved.
+//
+
+import UIKit
+
+extension UIApplication {
+    
+    static func statusBarHeight() -> CGFloat {
+        
+        let kStatusBarHeight: CGFloat = CGRectGetHeight(UIApplication.sharedApplication().statusBarFrame)
+        let statusBarVisible = !UIApplication.sharedApplication().statusBarHidden
+        return statusBarVisible ? kStatusBarHeight : 0
+    }
+}

Classes/Extensions/UIApplicationExtension.swift

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+//
+//  UICollectionViewExtension.swift
+//  CKWaveCollectionViewTransition
+//
+//  Created by Salvation on 7/21/15.
+//  Copyright (c) 2015 CezaryKopacz. All rights reserved.
+//
+
+import UIKit
+import ObjectiveC
+
+private var selectedIndexPathAssociationKey: UInt8 = 0
+private var fromPointAssociationKey: UInt8 = 1
+
+extension UICollectionViewController {
+    
+    var selectedIndexPath: NSIndexPath! {
+        get {
+            return objc_getAssociatedObject(self, &selectedIndexPathAssociationKey) as? NSIndexPath
+        }
+        set(newValue) {
+            objc_setAssociatedObject(self, &selectedIndexPathAssociationKey, newValue, objc_AssociationPolicy(OBJC_ASSOCIATION_RETAIN))
+        }
+    }
+    
+    var fromPoint: CGPoint! {
+        get {
+            let value = objc_getAssociatedObject(self, &fromPointAssociationKey) as? NSValue
+            return value!.CGPointValue()
+        }
+        set(newValue) {
+            let value = NSValue(CGPoint: newValue)
+            objc_setAssociatedObject(self, &fromPointAssociationKey, value, objc_AssociationPolicy(OBJC_ASSOCIATION_RETAIN))
+        }
+    }
+}

Classes/Extensions/UICollectionViewControllerExtension.swift

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+//
+//  UICollectionViewExtension.swift
+//  CKWaveCollectionViewTransition
+//
+//  Created by Salvation on 7/21/15.
+//  Copyright (c) 2015 CezaryKopacz. All rights reserved.
+//
+
+import UIKit
+
+extension UICollectionView {
+    
+    func numberOfVisibleRowsAndColumn() -> (rows: Int, columns: Int) {
+        
+        var rows = 1
+        var columns = 0
+        var currentWidth: CGFloat = 0.0
+        
+        let visibleCells = self.visibleCells() as? Array<UICollectionViewCell>
+        
+        for cell in visibleCells! {
+            
+            if (currentWidth + cell.frame.size.width) < self.frame.size.width {
+                currentWidth += cell.frame.size.width
+                if rows == 1 { //we only care about first row
+                    
+                    columns++
+                }
+            } else {
+                rows++
+                currentWidth = cell.frame.size.width
+            }
+        }
+        
+        return (rows, columns)
+    }
+
+}

Classes/Extensions/UICollectionViewExtension.swift

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+//
+//  UIViewControllerExtension.swift
+//  CKWaveCollectionViewTransition
+//
+//  Created by Salvation on 7/21/15.
+//  Copyright (c) 2015 CezaryKopacz. All rights reserved.
+//
+
+import UIKit
+
+extension UIViewController {
+    
+    func navigationBarHeight() -> CGFloat {
+        
+        let kNavigationBarHeight: CGFloat = 44.0
+        
+        var navigationBarVisible = true
+        if let navigationController = self.navigationController {
+            navigationBarVisible = !navigationController.navigationBarHidden
+        }
+        
+        return navigationBarVisible ? kNavigationBarHeight : 0
+    }
+}